cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A020668 Numbers of the form x^2 + 4*y^2.

Table of values

n a(n)
1 0
2 1
3 4
4 5
5 8
6 9
7 13
8 16
9 17
10 20
11 25
12 29
13 32
14 36
15 37
16 40
17 41
18 45
19 49
20 52
21 53
22 61
23 64
24 65
25 68
26 72
27 73
28 80
29 81
30 85
31 89
32 97
33 100
34 101
35 104
36 109
37 113
38 116
39 117
40 121
41 125
42 128
43 136
44 137
45 144
46 145
47 148
48 149
49 153
50 157
51 160
52 164
53 169
54 173
55 180
56 181
57 185
58 193
59 196
60 197
61 200
62 205
63 208

List of values

[0, 1, 4, 5, 8, 9, 13, 16, 17, 20, 25, 29, 32, 36, 37, 40, 41, 45, 49, 52, 53, 61, 64, 65, 68, 72, 73, 80, 81, 85, 89, 97, 100, 101, 104, 109, 113, 116, 117, 121, 125, 128, 136, 137, 144, 145, 148, 149, 153, 157, 160, 164, 169, 173, 180, 181, 185, 193, 196, 197, 200, 205, 208]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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